Heading 2933 · Heterocyclic compounds with nitrogen hetero-atom(s) only
2933.52
Malonylurea (Barbituric acid) and its salts:
Official notices
Actions of the President, the USTR or U.S. Customs and Border Protection (CBP) that name this code.
- Sep 23, 2026 · Commerce Guidance and Procedures for Implementing Tariff Adjustments for Specialty Pharmaceuticals and Associated Pharmaceutical Ingredients and Technical Corrections to the Harmonized Tariff Schedule of the United States for Duties Imposed Under Proclamation 11020
- Jul 23, 2026 · The White House Actions by the United States in the Investigations Under Section 301 of the Trade Act of 1974 of the Acts, Policies, and Practices of 60 Economies Related to the Failure of Each Economy To Impose and Effectively Enforce a Prohibition on the Importation of Goods Produced With Forced Labor
- Jul 20, 2026 · The White House Action by the United States in the Investigation Under Section 301 of the Trade Act of 1974 of Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation
- Apr 2, 2026 · The White House Adjusting Imports of Pharmaceuticals and Pharmaceutical Ingredients Into the United States
- Feb 20, 2026 · The White House Imposing a Temporary Import Surcharge To Address Fundamental International Payments Problems
- Nov 14, 2025 · The White House Modifying the Scope of the Reciprocal Tariffs With Respect to Certain Agricultural Products
- Sep 5, 2025 · The White House Modifying the Scope of Reciprocal Tariffs and Establishing Procedures for Implementing Trade and Security Agreements
- Apr 2, 2025 · The White House Regulating Imports With a Reciprocal Tariff To Rectify Trade Practices That Contribute to Large and Persistent Annual United States Goods Trade Deficits
Mentioned in Chapter 99
The parts of Chapter 99, in the 2026 HTS Revision 22, that list HTS 2933.52, a broader code that includes it, or a narrower code within it.
| U.S. note | Excerpt | Headings that refer to it |
|---|---|---|
| U.S. note 2(aa)(ii) | (ii) As provided in heading 9903.03.03, the additional duty imposed by heading 9903.03.01 shall not apply to articles the product of any country that are classifiable in the following subheadings of the HTSUS: [Compiler's note: List may… | 9903.03.01, 9903.03.03 |
| U.S. note 2(v)(iii)(a) | (a) As provided for in heading 9903.01.32, the additional duties imposed by headings 9903.01.25, 9903.01.35, 9903.01.39, 9903.01.63, 9903.02.01–9903.02.73, 9903.02.79–9903.02.80, 9903.02.82–9903.02.83, and 9903.02.87–9903.02.88 shall not… | 9903.01.25, 9903.01.32, 9903.01.43, 9903.01.44, 9903.01.45, 9903.01.46 and 107 more |
| U.S. note 50(a)(v) | (v) As provided in heading 9903.05.06, the additional duty imposed by heading 9903.05.01 shall not apply to articles the product of Brazil for use in pharmaceutical applications, and that are classifiable in the following provisions of the… | 9903.05.01, 9903.05.06 |
| U.S. note 52(e) | (e) As provided in heading 9903.05.89, the additional duties imposed by headings 9903.05.20–9903.05.84 shall not apply to articles that are for use in pharmaceutical applications and that are classifiable in the following provisions of the… | 9903.05.20, 9903.05.21, 9903.05.22, 9903.05.23, 9903.05.24, 9903.05.25 and 60 more |
Being listed is not owing a duty. A note may list goods that a measure leaves out; whether a heading applies depends on the origin, the date and the product; and the measures on all the goods of a country list no code at all. The calculator says what applies.
In the tariff
- 2933Heterocyclic compounds with nitrogen hetero-atom(s) only
- Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure
- 2933.52Malonylurea (Barbituric acid) and its salts
- 2933.52.10.00Malonylurea (barbituric acid)Free
- 2933.52.90.00OtherFree